"..the nitric oxide produced in the sinuses serves as a first line of defense in the upper respiratory tract. It is a potent antiviral, antibacterial, and antifungal agent that inhibits the growth of inhaled pathogens before they reach the lower respiratory tract." https://www.profolus.com/topics/health-benefits-humming-nitric-oxide-vagus-nerve/
formica replied to on December 17th, 2025 at 02:57 pm